KR100581944B1 - Plasma display panel - Google Patents

Abstract

The present invention introduces a discharge cell having a new structure to significantly improve the aperture ratio and luminous efficiency, and protect the electrode and the partition wall when driving the plasma display panel, and the protective film that functions to increase the amount of discharge by emitting secondary electrons To optimize the

In order to achieve this object, the present invention defines a transparent front substrate and a rear substrate which is disposed to face the front substrate, the rear substrate is edge-sealed, and discharge cells which are spaces disposed between the front substrate and the rear substrate to generate a discharge. And electrode pairs having partition walls formed of a dielectric material, and having X electrodes and Y electrodes disposed to enclose the discharge cells in the partition walls and spaced apart from each other and extending in parallel in the direction crossing the discharge cells. And a protective film disposed to cover side surfaces of the partition walls in the discharge cell, and a phosphor layer disposed in the discharge cell, disposed between the phosphor layer and the back substrate, and crossing the electrode pair in the discharge cell. The thickness of the protective layer covering the address electrodes extending in the direction and the side surface of the barrier rib on which the Y electrode is disposed is doubled. A protective film covering the side surface of the partition wall that provides a plasma display panel, characterized in that thicker than the thickness.

Description

 Plasma display panel {Plasma display panel}

1 is an exploded perspective view showing a plasma display panel of the present invention;

2 is a perspective view showing the arrangement of electrode pairs, address electrodes and discharge cells of the plasma display panel of the present invention;

3 is a cross-sectional view of the plasma display panel of the present invention taken along line III-III.

<Description of Symbols for Major Parts of Drawings>

100: plasma display panel

110: front panel 120: rear panel

113: X electrode 112: Y electrode

115: forward bulkhead 116: shield

124: rear partition 130: partition

122: address electrode 123: dielectric layer

125: phosphor layer 126: discharge cell

The present invention relates to a plasma display panel.

In general, a plasma display panel is an apparatus for displaying an image using a gas discharge phenomenon, and is excellent in various display capacities such as display capacity, brightness, contrast, afterimage, viewing angle, etc. have. In such a plasma display panel, a discharge occurs in a discharge cell filled with a discharge gas by a direct current or an alternating voltage applied between electrodes, and ultraviolet rays emitted from the discharge gas excite the phosphor to emit visible light, thereby generating an image. Implement

Among the plasma display panels, a plasma display panel that is widely used is an alternating current type three-electrode surface discharge plasma display panel in which a pair of sustain electrodes are positioned on the rear surface of the front substrate and discharge occurs on the rear surface of the front substrate.

The AC three-electrode surface discharge plasma display panel has a front dielectric layer and a protective film formed thereon as well as an electrode pair for discharging the back surface of the front substrate through which visible light passes. Have

In addition, in such an AC type three-electrode surface discharge plasma display panel, since the electrode pairs for discharging are disposed on the rear surface of the front substrate, most of the electrode pairs are used to pass visible light generated in the phosphor layer disposed inside the discharge cells. It should be formed of high resistance ITO electrode. Therefore, a voltage drop may occur at the ITO electrode, which causes a problem that the driving voltage increases and the screen is uneven.

On the other hand, in order to improve the high resistance characteristics of the ITO electrode by connecting the bus electrode formed of a metal to the ITO electrode to improve the problem of the voltage drop, the width of the bus electrode is limited due to the visible light transmittance problem, the driving voltage The problem of increase and screen unevenness is not improving.

In addition, in such an AC-type three-electrode surface discharge plasma display panel, an electrode for discharging is formed on the back surface of the front substrate through which visible light passes, so that the discharge is concentrated only on a portion of the discharge cell, thereby discharging the space of the discharge cell. Could not be used efficiently. As a result, this inefficiency forced the formation of a high driving voltage for discharging, thereby increasing the price of the driving circuit which occupies a large part of the price of the plasma display panel.

In addition, when such an AC type three-electrode surface discharge plasma display panel is used for a long time, charged particles of the discharge gas are diffused backward from the back surface of the front substrate by the electric field and accelerated, thereby causing ion sputtering in the phosphor. This increases and there is a problem causing permanent afterimage on the screen.

On the other hand, in general, since the plasma display panel displays an image by using visible light generated through discharge, as the amount of discharge is increased under the same conditions, the amount of visible light is increased to increase luminance, and accordingly, the plasma display panel is increased. You can improve the picture quality of the panel. At this time, the increase or decrease of the amount of discharge depends on how many charged particles are accelerated by the electric field formed by the electrical signal applied to the electrodes to have the kinetic energy to cause the discharge. For this reason, several attempts have been made to increase the amount of accelerated charged particles in the discharge cell. A method of disposing a protective film for emitting secondary electrons by collision of charged particles in the double discharge cell is very effective for increasing the discharge amount. It turned out.

However, the amount of emission of secondary electrons varies depending on the arrangement state of such a protective film. In addition, when the plasma display panel is driven, the protective film is reduced in thickness by collision of charged particles, and the decrease in thickness is directly related to the lifetime of the plasma display panel. Therefore, although the thickness of the protective film needs to be sufficiently thick, there is a limit to the increase in the thickness due to the limitation of other design factors.

On the other hand, in order to implement an image, a plasma display panel generally needs to select a discharge cell so that a discharge occurs in response to an external image signal to generate visible light. At this time, the operation of selecting the discharge cells is generally performed by the address discharge, which must be accurately and stably generated due to its characteristics, and this characteristic has a very important effect on image realization and image quality. Therefore, it is very important to ensure that such address discharge occurs stably.

The present invention is intended to solve the following matters to solve the above problems.

First, it aims to increase brightness by improving aperture ratio and remarkably improving the transmittance of visible light.

Secondly, it is an object to make it possible to use a material other than ITO as a material for electrode formation, to reduce the manufacturing cost of the electrode and to facilitate the large area of the plasma display panel.

Third, an object of the present invention is to reduce the manufacturing cost of the plasma display panel by increasing the amount of discharge by causing the discharge to be three-dimensionally formed in the entire discharge cell, thereby reducing the driving voltage.

Fourthly, an object of the present invention is to prevent ion sputtering of a phosphor to increase the lifetime of the phosphor.

Fifth, the object of the present invention is to optimize the arrangement of the protective film to realize stable address discharge and to increase the lifetime of the plasma display panel.

Sixthly, an object of the present invention is to increase the discharge amount of the plasma display panel by increasing the amount of secondary electrons generated in the protective film, thereby increasing the luminance of the plasma display panel.

In order to achieve the above object, the present invention is a discharge cell which is disposed to face the transparent front substrate and the front substrate, the rear substrate is edge-sealed, and is disposed between the front substrate and the rear substrate to generate a discharge A pair of electrodes formed with a dielectric material, and having an X electrode and a Y electrode arranged to surround the discharge cells in the partition wall and spaced apart from each other and extending in parallel in a direction crossing the discharge cells. And a protective film disposed to cover side surfaces of the partition wall in the discharge cell, a phosphor layer disposed in the discharge cell, the phosphor layer and the rear substrate, and intersect with the electrode pair in the discharge cell. And a thickness of the passivation layer covering the side surfaces of the partition wall on which the Y electrode is disposed, the address electrodes extending in a direction; A protective film covering the side surface of the partition wall that is disposed pole provides a plasma display panel, characterized in that thicker than the thickness.

As a result, the thickness of the protective film covering the side surface of the partition wall on which the Y electrode is frequently collided with the charged particles due to the address discharge and the sustain discharge is thicker, so that the emission amount of secondary electrons and the plasma are thicker. Increase the life of the display panel. In addition, an address discharge occurring between the Y electrode and the address electrode can be more easily generated.

On the other hand, the Y electrode is preferably disposed behind the X electrode in a direction away from the front substrate.

In addition, it is preferable that the Y electrode is a scan electrode and the X electrode is a sustain electrode.

In addition, the passivation layer may be formed to have a thick thickness in a direction away from the front substrate.

In addition, it is preferable that the roughness of the protective film covering the side surface of the partition wall on which the Y electrode is disposed is greater than the roughness of the protective film covering the side surface of the partition wall on which the X electrode is disposed.

Meanwhile, the protective film may be disposed by a deposition process.

Meanwhile, the partition wall may be divided into a front partition wall and a rear partition wall. In this case, the front partition wall may be divided into a first partition wall and a second partition wall based on a direction away from the front substrate, and an X electrode on the first partition wall. Is disposed, and it is preferable that Y electrodes are disposed on the second partition wall. In addition, the phosphor layer is preferably disposed in a space defined by the rear partition and the rear substrate.

On the other hand, it is preferable to further include a dielectric layer disposed to cover the address electrode, the electrode pair is preferably extended in a ladder shape.

Hereinafter, exemplary embodiments of the plasma display panel 100 of the present invention will be described with reference to FIGS. 1 to 3.

 The plasma display panel 100 according to the present invention shown in FIG. 1 is manufactured separately to facilitate the manufacturing process, and then the front panel 110 and the rear panel 120 are joined by a coupling member such as a frit. ). However, the plasma display panel of the present invention is not necessarily manufactured by being divided into a front panel and a rear panel, which is just one example.

On the other hand, the front panel 110 is provided with a front substrate 111 formed of a transparent material, preferably soda glass. In addition, the front panel 110 is formed on the rear of the front substrate, more specifically, the rear surface 111b of the front substrate, and the front substrate 111 and the rear substrate 121 and rear partition wall 124 to be described later. Together with the discharge cells 126, which are spaces that cause discharge, the front partition wall 115 is formed of a dielectric material.

In addition, the front panel 110 is disposed to surround the discharge cells 126 in the front partition wall 115, and is spaced apart from each other and extends in parallel in a direction crossing the discharge cells 126 ( Electrode pairs 114 having a 113 electrode and a Y electrode 112. In this case, since the electrode pair 114 is not positioned on the optical path that is the path through which visible light passes, the electrode pair 114 does not need to be formed as a transparent ITO electrode, and may be formed of Ag, Cu, Cr, or the like having good electrical conductivity.

Meanwhile, as can be seen in the enlarged view of FIG. 1, the front partition wall 115 may be divided into a first partition wall 115f and a second partition wall 115r based on a direction away from the front substrate 111. In this case, the X electrodes 113 may be disposed in the first partition wall 115f, and the Y electrodes 112 may be disposed in the second partition wall 115r.

In this case, the division of the front partition wall into the first partition wall 115f and the second partition wall 115r does not mean that the first partition wall and the second partition wall are physically completely separated, and the X electrode and the Y electrode In order to be spaced apart from each other, in order to solve the problem that the X electrode and the Y electrode may be shorted to each other due to a defect during the process, it means that the front partition is formed divided into the first partition and the second partition. On the other hand, the front bulkhead 115 is not necessarily formed to be divided into a first partition and a second partition, it may be formed and inserted at the same time in a modular form.

On the other hand, the front partition wall 115 may be formed of a glass component including elements such as Pb, B, Si, Al, and O, etc., if necessary, ZrO ₂ , TiO ₂ , and Al ₂ O _It may be formed of a dielectric including a filler such as ₃ and pigments such as Cr, Cu, Co, Fe, TiO _2, etc., wherein the dielectric is charged particles when a pulse voltage is applied to the electrode pair 114. Induces the wall charge participating in the discharge to enable driving through the memory effect, and serves to protect the electrode pair 114 from being damaged due to the collision of charged particles accelerated during discharge.

Meanwhile, the front panel 110 includes a passivation layer 116 disposed to cover the side surface 115a of the front partition wall 115 in the discharge cell 126. In this case, the passivation layer 116 may be disposed by a method such as deposition using MgO, and the like, since the passivation layer does not need to be disposed at a position on the optical path of visible light, the secondary electron emission characteristic is good and durable. The protective film may be formed of a material such as carbon nanotubes (CNT).

Meanwhile, the passivation layer 116 covers the side surface of the front partition wall 115 on which the Y electrode 112 is disposed, and more specifically, the thickness t of the passivation layer 116r covering the side surface of the second partition wall 115r (t). _r ) is preferably disposed to be thicker than the thickness t _f of the side surface of the front partition wall 115 on which the X electrode 113 is disposed, and more particularly, the passivation layer 116f covering the first partition wall 115f. . In addition, the protective film 116 preferably has a thick thickness t in the direction away from the front substrate.

On the other hand, the arrangement of the protective film 116 is to make the front bulkhead 115 is in the form of a wedge having a constant inclination, and is easily carried out by performing a deposition process toward the front substrate from the rear surface 115b of the front bulkhead 115. You can get it. In this case, when the protective film 116 is disposed by the deposition process, the thickness t _{r of the} protective film covering the second partition wall 115r disposed closer to the mechanism on which the deposition is performed may be made thicker. In this process, the passivation layer 116 is disposed in such a manner that the thickness t becomes thick in a direction away from the front substrate 111, and thus the side surface of the first partition wall 115f on which the X electrode 113 is disposed. The thickness t _f of the protective film covering the layer becomes thinner.

On the other hand, the shape of the front partition wall 115 can be easily achieved by adjusting the angle of the injection hole for injecting ceramic particles when the sand blasting method is applied during the process of forming the front partition wall, the photoresist method It can also be easily achieved by.

On the other hand, in addition to such a method, when forming the second partition wall 115r in which the Y electrode is disposed in the front partition wall 115, the viscosity of the dielectric is adjusted upward, thereby increasing the roughness of the side surface of the second partition wall. During deposition, the thickness of the passivation layer disposed on the side of the second partition wall may be arranged to be thicker.

Meanwhile, in the process of arranging the protective film, the roughness of the protective film disposed to cover the side surface of the second partition wall 115r on which the Y electrode 112 is disposed may increase.

On the other hand, the effect obtained by the arrangement of the protective film 116 will be described later.

On the other hand, the rear panel 120 is preferably provided with a back substrate 121 formed of soda glass or the like. In this case, the back substrate is not a component located on a path where visible light generated in a discharge cell travels, and thus it is not necessarily formed of transparent glass, and may be formed of plastic for reducing reactive power or weight. Or other materials such as metal.

In addition, the rear panel 120 is disposed between the phosphor layer 125, which will be described later, and the rear substrate 121, more specifically on the front surface 121a of the rear substrate in the present preferred embodiment, and the discharge In the cell 126, the address electrodes 122 extend in a direction crossing the electrode pair 114. At this time, since the address electrode 122 is not positioned on the optical path, which is the path through which visible light travels, similarly to the electrode pair 114, it is not necessary to form a transparent ITO electrode, and has good electrical conductivity of Ag, Cu, Cr. Or the like.

On the other hand, the rear panel 120 preferably includes a dielectric layer 123 disposed to cover the address electrode 122. In this case, the dielectric layer is not necessarily an essential component. If the phosphor layer 125 to be described below is disposed to cover the address electrode, the phosphor layer may function as a dielectric layer and thus may be omitted. However, the dielectric layer 123 is more preferably disposed to induce charged particles and to protect the address electrode 122.

Meanwhile, the rear panel 120 defines discharge cells 126 together with the front partition wall 115, the front substrate 111, and the rear substrate 121, and the partition wall 130 together with the front partition wall 115. And a rear bulkhead 124 constituting a part thereof. In this case, the rear bulkhead 124 may be formed of the same material as the front bulkhead 115.

On the other hand, the front partition wall 115 and the rear partition wall 124 when the front panel 110 and the rear panel 120 is combined to produce a plasma display panel 100, one partition wall 130 with each other Formed and functions. In this case, since the front bulkhead 115 and the rear bulkhead 124 are not necessarily separated and manufactured separately on the front panel and the rear panel, the front bulkhead 115 and the rear bulkhead 124 are different from each other. ) May be integrally formed to form the partition wall 130.

On the other hand, in the shape of the discharge cell 126 defined by the partition wall 130, although the cross section is shown in Figure 1 as being rectangular, there is no limitation on the shape of the discharge cell, polygonal, circle, honeycomb form Various forms of shape can be modified.

On the other hand, the phosphor layer 125 is divided into red, green, and blue light emitting phosphor layers in order to enable the plasma display panel to implement a color image. In the discharge cell 126, in the preferred embodiment of the present invention, In more detail, a space defined by the rear barrier rib and the dielectric layer 123 may be disposed in a space defined by the rear barrier rib 124 and the rear substrate 121 when the dielectric layer is not disposed. The light emitting, green light emitting, and blue light emitting phosphor layers may be disposed inside the discharge cell to form a unit pixel for implementing a color image.

On the other hand, the phosphor layer 125 is a space defined by the dielectric layer 123 and the rear partition 124 is a phosphor paste in which any one of a phosphor, a solvent, and a binder of a red light emitting phosphor, a green light emitting phosphor, and a blue light emitting phosphor is mixed. It is formed by going through a drying and firing process after being applied to.

On the other hand, the red light emitting phosphor includes (Y, Gd) BO ₃ : Eu ³⁺ and the like, and the green light emitting phosphor includes Zn ² Si 04: Mn ²⁺ , and as the blue light emitting phosphor, BaMgAl ₁₀ O ₁₇ : Eu ²⁺ is used. In addition, various phosphors may be used.

Meanwhile, the discharge cells in which the red, green, and blue light emitting phosphor layers are disposed may be adjacent to each other in one direction to form a unit pixel which is a basic unit for realizing an image. However, the arrangement of the discharge cells of the present invention is not limited to being arranged in one direction as described above to implement a color image, and in some cases, the width or length of the discharge cells may be different depending on the efficiency of the phosphor. In addition, the arrangement may vary from lattice to delta.

Meanwhile, the front panel 110 and the rear panel 120 are joined and sealed by a coupling member such as a frit (not shown), and inside the discharge cell, Xen gas (10% before and after) is discharged. The discharge gas consisting of any one of neon (Ne), helium (He), or argon (Ar) or a mixed gas of two or more thereof is filled. In this case, since the discharge gas is generally filled at a pressure lower than atmospheric pressure, the front panel 110 and the rear panel 120 are supported by the partition wall 130.

Hereinafter, the arrangement of the electrode pairs 114 of the plasma display panel 100 of the present invention will be described with reference to FIG. 2. 2 shows an arrangement of the electrode pair 114 including the X electrode 113 and the Y electrode 112, the address electrode 122, and the discharge cells 126. In this case, the X electrode 113 and the Y electrode 112 has a ladder shape and extends in parallel to each other along the direction of the x-axis, the X electrode 113 and the Y electrode 112 in the discharge cell 126. The address electrode 122 extends in the direction of the y-axis that intersects with the extending direction. Meanwhile, the X electrode and the Y electrode do not necessarily extend in a ladder shape, and in some cases, the extension may be extended by an extension having a predetermined size.

On the other hand, since the distance between the Y electrode 112 and the address electrode 122 is short, it is preferable that an address discharge for selecting a discharge cell in which sustain discharge is to occur occurs between the Y electrode 112 and the address electrode 122. In this case, it is preferable that the Y electrode 112 be a scan electrode and the X electrode 113 be a sustain electrode.

In this case, since the address discharge refers to a discharge occurring independently in a discharge cell selected by the crossing of the Y electrode and the address electrode, the meaning that the Y electrode 112 becomes a scan electrode means that an address electrode (for each of the Y electrodes 112) is used. Like 122), it means that the driving pulse signal is applied independently.

In addition, the X electrode 113 becomes the sustain electrode, which means that the entire driving pulse signal is applied to all of the X electrodes without applying an independent driving pulse signal, thereby causing sustain discharge. (113) is used. However, all of the X electrodes 113 do not necessarily need to have a signal applied in common, and if necessary, a signal may be applied separately between the X electrodes.

Hereinafter, an example of the operation of the plasma display panel 100 of the present invention and the reason for arranging the protective film 116 in the present invention will be briefly described with reference to FIG. 3.

The driving method for driving the plasma display panel according to the present invention may include various driving methods such as ADS driving and ALIS driving, and various factors such as image quality and response speed of the plasma display panel may vary depending on the driving method. Since the essential features of the present invention are not changed, an example of driving the plasma display panel of the present invention will be described below with reference to the ADS driving method.

In general, a discharge occurs in each of the discharge cells 126 included in the plasma display panel for displaying an image for realizing an image. As a result, the state of the wall charges or the amount of charged particles are different between the discharge cells 126, and thus, the desired control between the discharge cells is desired when the discharges occurring in the discharge cells are to be controlled in a uniform manner. It happens that it is difficult to make. In order to prevent such a difficulty of the discharge control, by applying a high voltage of a predetermined level or more to the discharge cells at the same time to generate the discharge in all the discharge cells by removing the wall charges existing in the discharge cells to equalize, discharge cells Induced to be the same state of the charged particles in this is called a reset discharge.

Such a reset discharge is generally performed by applying a high potential lamp potential to all the Y electrodes 112 and applying a ground potential to all the address electrodes 122 to discharge all of the discharge cells.

Then, after the above-described reset discharge occurs, an address discharge occurs. In this case, the address discharge refers to a discharge cell in which one of the electrode pairs 114, that is, the Y electrode 112 and the address electrode 122, intersects a discharge cell in which an image is to be implemented in response to an external image signal. 126, a predetermined pulse voltage of opposite polarity is applied to the Y electrode 112 and the address electrode 122 to cause the discharge cell to discharge, and the discharge cell is caused by the discharge. The sidewalls of the barrier ribs 130 in the inner surface, and more specifically, the charges are attached to the sidewalls 115a of the front barrier wall 115 to discharge the wall charges to be accumulated.

On the other hand, when such an address discharge occurs, the charged particles have a side surface of the second partition wall 115r on which the Y electrode 112 is disposed, rather than a protective film 116f covering the side surface of the first partition wall 115f on which the X electrode is disposed. It collides more intensively with the protective film 116r that covers the gap. At this time, due to the collision of the charged particles, the protective film 116r covering the side surface of the second partition wall is damaged more quickly, and the thickness of the protective film 116r is reduced when used for a long time. As a result, when the passivation layer 116r disappears, even if the passivation layer 116f covering the side surface of the first partition wall remains, the partition wall and the Y electrode of the plasma display panel may be damaged so that the plasma display panel may display a desired image. It can't be implemented.

Therefore, in the present invention, the thickness of the passivation layer 116r covering the side surface of the second partition wall 115r is thicker than the thickness of the passivation layer 116f covering the side surface of the first partition wall 115f, thereby relatively increasing the thickness of the charged particles. The protective film 116r with frequent collisions compensates for the decrease in thickness more quickly.

In addition, when the protective film 116r covering the side surface of the second partition wall 115r is formed to have a larger roughness, when the charged particles collide with the protective film 116r, the protective film 116r roughness may cause the protective film 116r to have a larger roughness. At 116r, the discharge amount of the secondary electrons is increased, thereby increasing the discharge amount at the time of address discharge, so that address discharge can be stably generated.

Subsequently, when a high voltage pulse voltage is applied to the Y electrode 112 and a pulse voltage of a relatively low voltage is applied to the X electrode 113, when the address is discharged due to a potential difference generated between the X electrode and the Y electrode. The wall charges accumulated on the inner side of the discharge cell 126 are moved. At this time, as the wall charges move, the discharge gas atoms in the discharge cells collide with the wall charges, thereby causing a discharge to generate plasma. At this time, the discharge is likely to occur from the portions close to each other of the X electrode 113 and the Y electrode 112 in which a relatively strong electric field is formed.

At this time, in the case of the plasma display panel 100 of the present invention, the electrode pairs 114 are disposed in the partition wall 130 to surround the discharge cells, unlike the conventional AC type three-electrode surface discharge plasma display panel. As a result, the probability of discharge occurring on the side surfaces of the discharge cells in the vicinity where the X electrode 113 and the Y electrode 112 are disposed increases, and thus, unlike the conventional AC three-electrode surface discharge plasma display panel, Discharge may occur on the inner side of the surroundings, thereby greatly increasing the probability of discharge and the amount of discharge.

In addition, when the discharge is successfully generated along the inner side of the discharge cell, and the voltage between the discharge electrodes is maintained for a predetermined time, the electric field formed on the side of the discharge cell 126 is strongly concentrated in the center, The area of discharge is greatly enlarged as compared with the prior art, whereby the amount of ultraviolet rays generated by the discharge is increased.

In addition, since the electric field is strongly concentrated in the center during discharge, the amount of accelerated charged particles proceeding to the phosphor layer 125 is lower than that of the alternating three-electrode surface discharge type, and ion sputtering is a phenomenon in which ions collide with the phosphor layer. This occurs less frequently and can increase the life of the phosphor layer.

Meanwhile, the ultraviolet rays generated by the discharge excite the phosphor layer 125 disposed in the discharge cell, and the visible phosphor layer moves to a low energy level to generate visible light, thereby realizing an image of the plasma display panel.

On the other hand, if the voltage difference between the electrode pairs 114 after the discharge is lower than the discharge voltage, the discharge is no longer generated, the space charge and the wall charge is formed in the discharge cell 126. At this time, when the polarity of the pulse voltage between the discharge electrodes is changed and a voltage lower than the applied voltage is applied, the discharge starting voltage is reached with the help of the wall charge, and the discharge is generated again. When the pulse voltage is alternately applied between the electrode pairs 114 alternately, the discharge is maintained.

The following effects are produced by the present invention.

First, the electrode pairs, the dielectric layer and the protective film do not need to be disposed on the back side of the front substrate, so that the components located on the optical path, which is the path of visible light, are limited to the front substrate, thereby greatly improving the aperture ratio. Accordingly, the transmittance of visible light is significantly improved, and the brightness is improved.

Secondly, unlike conventional AC three-electrode surface discharge plasma display panels, electrode pairs are arranged in the partition wall so that a material other than ITO can be used as a material for electrode formation, thereby reducing the manufacturing cost of the electrode and The electrical conductivity of is improved, making it easy to increase the area of the plasma display panel.

Third, the amount of discharge is dramatically increased compared to the conventional AC three-electrode surface discharge plasma display panel in which the discharge is formed in three dimensions in the entire discharge cell, and the discharge is formed on one surface of the discharge cell. The manufacturing cost of the plasma display panel was reduced by the reduction of the pressure.

Fourthly, the discharge is concentrated in the center and the amount of charged particles accelerated toward the phosphor layer is reduced, thereby preventing ion sputtering of the phosphor, thereby increasing the life of the phosphor.

Fifth, the arrangement of the protective film is optimized to realize stable address discharge and increase the lifetime of the plasma display panel.

Sixthly, the discharge amount of the plasma display panel is increased by increasing the emission amount of secondary electrons generated in the protective film, thereby increasing the brightness of the plasma display panel.

Although the present invention has been described with reference to the embodiments shown in the drawings, this is merely exemplary, and it will be understood by those skilled in the art that various modifications and equivalent other embodiments are possible. Therefore, the true technical protection scope of the present invention will be defined by the technical spirit of the appended claims.

Claims (11)

A rear substrate disposed to face the transparent front substrate and the front substrate, and the edge of which is sealed; Barrier ribs disposed between the front substrate and the rear substrate to define discharge cells, which are spaces for generating discharge, and formed of a dielectric; Electrode pairs disposed in the partition wall to surround the discharge cells and having X and Y electrodes spaced apart from each other and extending in parallel in a direction crossing the discharge cells; A protective film disposed to cover a side surface of the partition wall in the discharge cell; A phosphor layer disposed in the discharge cell; And An address electrode disposed between the phosphor layer and the rear substrate and extending in a direction crossing the electrode pair in the discharge cell; And a thickness of the passivation layer covering the side surface of the partition wall on which the Y electrode is disposed is thicker than a thickness of the passivation layer covering the side surface of the partition wall on which the X electrode is disposed. The method of claim 1, And the Y electrode is disposed behind the X electrode in a direction away from the front substrate. The method of claim 1, The Y electrode is a scan electrode, and the X electrode is a sustain electrode. The method of claim 1, And the passivation layer is thickened in a direction away from the front substrate. The method of claim 1, And the roughness of the passivation layer covering the side surface of the partition wall on which the Y electrode is disposed is greater than the roughness of the passivation layer covering the side surface of the partition wall on which the X electrode is disposed. The method of claim 1, The protective film is a plasma display panel, characterized in that disposed by the deposition process. The method of claim 1, And the partition wall is divided into a front partition wall and a rear partition wall. The method of claim 7, wherein The front partition is divided into a first partition and a second partition based on a direction away from the front substrate, the first electrode is arranged in the X electrode, the second partition is characterized in that the plasma disposed on the Y electrode Display panel. The method of claim 7, wherein And the phosphor layer is disposed in a space defined by the rear partition and the rear substrate. The method of claim 1, And a dielectric layer disposed to cover the address electrode. The method of claim 1, And the electrode pairs extend in a ladder shape.

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